The correct answer is Sikkim. Sikkim Chief Minister Prem Singh Tamang on the occasion of World Environment Day on 5 June 2022 declared Blue Duke the state butterfly. Blue Duke, which goes by the scientific name Bassarona durga, is unique to Sikkim and the eastern Himalayas. It was discovered in the state in 1858. It falls in Schedule 2 of the Wildlife Protection Act,1972 and is a protected species in the Himalayas. Additional Information?Sikkim is a state in northeast India, bordered by Bhutan, Tibet and Nepal. The area includes Indias highest mountain, 8,586m Kangchenjunga. Sikkim is also home to glaciers, alpine meadows and thousands of varieties of wildflowers. Sikkim:Capital: GangtokGovernor: Ganga PrasadChief minister: Prem Singh Tamang